Shaft.—A small column.
Solar.—The retiring or private room of the lord in early houses.
Span.—The width between the supports of an arch or roof.
Spandrel.—The space between an arch and the horizontal feature above it.
Squinch.—An arch carried across the internal angle of a tower or building.
Storey.—A horizontal division of a building containing rooms at one level.
String (of a Staircase).—The inclined piece of wood which carries the steps.
String-Course.—A narrow projecting horizontal line of stone or brickwork.
Tracery.—The ornamental stonework of a Gothic window formed by ramifications of the mullions; also decorations of a corresponding character applied to panels, &c.
Transome.—The horizontal cross-bar of a casement window (as distinguished from a sash window).